"Viruses play a significant role in the environmental factors that affect human immune system. Cytomegalovirus 28 and Epstein–Barr virus 6 are examples of viruses that have been linked to numerous autoimmune diseases, and now SARS-CoV-2 has the potential to be added to the list. The definite mechanisms underlying such phenomena are unknown. According to recent research, viruses can trigger autoimmunity through a number of different mechanisms, including molecular mimicry, epitope spreading, and bystander activation."